Door lock



June 6, 1950 "r. w. ANDERsbN 2,510,326

DOOR Locx Filed April 16; 1948 2 Sheets-Sheet 1 Fig.1

45 INVENTOR.

THOMAS W. ANDERSON AT TOR/V5) June '6, 1950 T. w. ANDERSON DOOR LOCK 2 Sheets-Sheet 2 Filed April l6, 1948 R E D N A W 8 A M 0 m A TTO/P/VE) Patented June 6, 1950 UNITED- STATES PATENT OFFICE noon LooK Thomas w. Anderson, Red Bluff, Calif.

Application April 16, 1948, Serial No. 21,371 '1 claims. (01. 292-223) This invention relates to improvements in door locks of the type having pivotally mounted shanks for moving a spring pressed latching bolt to a released position. V

The present invention is an improvement in the door lock disclosed and claimed in my United States Letters Patent No. 2,233,828, granted March 4,, 1941; and this application is acontinuation in part of my copending application entitled Door lock, filed July 1,1947 and bearing the Serial No. 758,407.

The door lock embodying the principles of the present. invention includes two pivotally arranged shanks for moving a, latching bolt to a released position, oneof the shanks being rotatable through ninety degrees to effect the looking or the release of the locking mechanism of the lock, and the other shank being secured against rotation, both shanks being mounted for rocking movement to release the latching bolt.

An object of the present invention. is to provide a door lock of the kind. characterized, em bodying novel locking means adapted to be controlled by the partial rotation of one of the shanks, and which when moved to a locked position will prevent either shank from being operated to release the latching bolt.

Another object Of this invention is to provide a door lock of the kind characterized, embodying a novel releasing arrangement for use in an emergency, whereby the locking means may be released from the outside without the necessity of partially rotating the inside shank to a releasing position.

Other and further objects of my invention will be pointed out hereinafter, or will be indicated in the appended claims orwill be obvious to one; skilled in the art upon an understanding of the present disclosure. For the purpose of this application I have elected to show herein certain forms and. details of a door lock representative of'my" invention; it is to be understood, however, that the embodiment of my invention herein shown and described is for the purpose of illustration.

only and that therefore it is not tobe regarded as exhaustive of the variations of the invention." In the accompanying drawings: Fig. '1 is a horizontal. sectional view of a door lock embodying my invention;

Fig. 2 is a sectional view taken on'the-line 2 -2: of Fig. I;

Fig. 3 is a sectional view taken on the. line 3- 3 of Fig. 1; r

Fig. 4 is a sectional view taken on the line l4 of 3 showing one of the. shanks in a position 2 whereby it may be pivotally moved to release the latching bolt;

Fig. 5 is a similar view showing the shank in a locked position;

Fig. 6 is a plan view of the outside plate forming a part of the lock assembly; and

Fig. 7 is a plan view of the inside plate.

For illustration purposes my improved lock is shown in association with a door A which in ordinary practise is used with a frame B, a jam C and a strike plate D.

The present invention in its preferred form comprises an elongated cylindrical casing l which is closed at its front end by a plate 2 having an opening of suitable shape formed therein. The casing is mounted Within a mortise Within the door and suitable means such as screws are employed to secure the end plate to the door. A bolt head 3 extends through the opening in the opening in the end plate 2. Slidably mounted in the casing I is a latching bolt member 4 having a thin horizontally disposed forwardly extending portion 5 which is pivotally connected as at 6 to the bolt head 3, the said bolt head being also pivotally connected as by a hinge pin 1 to the plate 2. Secured to the latching bolt member 6 is an inwardly protruding abutment flange 8 for one end of a compression spring 9 which is arranged With its opposite end engaging with an abutment member Ill secured to and extending transversely inside the casing I. The compression spring 9 normally holds the bolt member with its head 3 in a latched position within the keeper opening of the strike plate D, as shown in Fig. 1. It is to be noted that the bolt head 3 is formed with an outwardly protruding portion 3' which abuts the plate 2 and thereby prevents the pivotal movement of the bolt head beyond its normal latching position.

Abolt actuating member H which in horizontal cross section is substantially U-shaped, is provided with outwardly protruding flanges 52 which normally engage with the forward faces of two inwardly protruding opposed flanges it formed on the rear end of the bolt member d. Secured to and extending between the legs of the bolt actuating member I i are bearing members M which are pivotally mounted on a transverse pin it suitably secured to the casing l. The transverse pin I5 is horizontally arranged in the casing and it pro- Vides pivot means about which the bolt actuating member Ii turns. The horizontally disposed legs of the bolt actuating member II are in suitably spaced relation to each other. The bolt actuating member is arranged so its outwardly disposed.

flanges I2 can exert a rearward pressure on either of the inwardly protruding flanges I3 of the bolt member 4 when rocked about its pivot I5, thereby drawing the bolt member rearwardly against the action of the compression spring 9 to a releasing position.

Positioned against the outside and inside surfaces of the door A are outside and inside circular plates 16 and 11, respectively, each of which has an outwardly protruding peripheral flange formed thereon. The circular plates I B and H are formed with centrally disposed rectangular openings lBa and Ila respectively, of substantially equal length. The rectangular opening No is somewhat wider than the opening lfia. Th outside and inside plates l6 and H are arranged so their rectangular openings 15a and Ila may be both positioned with their longitudinal axes in vertical positions. The outside and inside circular plates l6 and I1 are formed respectively with suitably shaped inwardly protruding lugs i5 and H, the said lugs being punched out and arranged to engage with the sides of a circular opening E in the door A. The lugs l6 and I? are positioned ninety degrees apart and they are so arranged with respect to the rectangular openings 16a and Na, respectively, that the plates l6 and ii are normally held in positions in which the said rectangular openings are centrally disposed with respect to the opening E of the door.

Positioned in engaging relation with the outer surfaces of the outside and inside plates l5 and [1, respectively, are ring shaped plates i8 and [9, respectively, are bearing plates 25 and 2 l, each of which carries an axially disposed bearing member 23.

The outside plate E5, the ring shaped plate l8 and the bearing plate 26 are secured together by suitable means such as pins 24 having flattened heads 25. The inside plate I1, the ring shaped plate l9 and the bearing plate 2! are secured together at the opposite ends of the pins 24 by adjustable screws 26 which engage with the internally threaded ends of the said pins. The screws 26 are adjustable to permit the lock mechanism to be used with doors of varying thicknesses. The pins 24 extend through two lateral extensions F of the hole E cut in the door. It will be noted that by adjusting the screws 26 so the inside and outside plates bear firmly against the opposite sides of the door, the lock will be held securely in place.

Rotatably mounted within the ring shaped plate I9 is a circular locking disc or member 21 having a flange 28 extending outwardly from its periphery. Suitable stop members 29' positioned approximately ninety degrees apart are formed on the inner edge of the ring shaped plate IS, the said stop members being arranged to engage with the flange 28 and thereby limit the rotary movement of the locking plate 21 in either direction. The locking plate is formed with a plurality of spaced protuberances 30 which are adapted to lodge in holes 3| in the inside plate when the said locking plate is in either its locked or unlocked position, as shown in Figs. 4 and 5, thereby normally holding the locking plate against rotation when the locking mechanism is unlocked. The holes 3| are formed in the inside plate when the lugs l1 are punched therefrom.

A shank 32 having a globular portion 33 which is movably supported by a bearing member 23, extends through the rectangular opening 16a of the outside plate. The inner end of the shank 32 is preferably formed with a rounded end 34 which operatively extends into the bolt actuating member II. The portion of the shank 32 which extends through the rectangular opening l6a of the outside plate 16 is formed to slidably fit inside the said rectangular opening. The outer end of the shank 32 has a handle 35 suitably secured thereto. It will be noted that the shank 32 is pivotally mounted in its associated bearin 23 for rocking movement, but that the sides of the opening 16a prevent its rotation.

A shank 36 having a globular portion 31 which is movably supported by the other bearing member 23, extends through a centrally disposed rectangular opening 38 in the locking disc 21 and also through the rectangular opening Na in the inside plate IT. The inner end of the shank 36 is preferably formed with a rounded end 39 which operatively extends into the bolt actuating member H. The portion of the shank which extends through the rectangular openings 38 and Ila of the locking disc 21 and the inside plate [1, respectively, is formed with substantially parallel sides which slidably fit against the opposed longitudinal sides of the opening 38, as shown in Figs. 4 and 5. The size and shape of this portion of the shank 36 is such that the latter may freely turn inside the wide rectangular openin Ha of the inside plate I1 but not independently of the locking disc 21. Thus when the shank 36 is turned through the rotation of a handle 46 which is secured thereto the locking disc 21 is turned with it. It will be noted that the shank 36 is pivotally mounted in its associated bearing 23 for rocking movement and that it may be turned through an angle of ninety degrees in either direction, its rotary movement being limited by the flange 28 of the locking disc 21 coming into engagement with either of the stop members 29 of the inside plate 11.

A helical compression spring 4| encircling the shank 36 exerts an inward pressure on the locking disc 21, thereby normally maintaining it in an operative position within the rin shaped plate I 9.

The inner rounded ends 34 and 39 of the shanks 32 and 36 respectively, closely but movably fit inside the bolt actuating member II as shown in Figs. 1, 2 and 3. It will be noted that when the locking disc 21 is positioned as shown in Fig. 4, with the longitudinal sides of its rectangular opening positioned vertically, either shank 32 or 36 may be rocked in a vertical plane to pivotally move the bolt actuating member I I about its horizontal pivot and thereby shift the latching bolt member 4 rearwardly to pivotally turn the bolt head 3 to an unlatched or released position with respect to the strike plate D. By turning the handle 40 to the right through ninety degrees the locking disc 21 is similarly rotated to a position in which its longitudinal dimension is in a horizontal position (Fig. 5), and crosswise with respect to the opening Ha of the inside plate [1. The width of the opening |1a is such that the shank 36 will closely fit against the opposed longitudinal sides of the said opening when in the locked position as shown in Fig. 5. Thus when the shank 36 and the locking disc 21 have been rotated through ninety degrees to position the opening 38 in a crosswise position with respect prevent the rotation of the locking disc to the right beyond its locked position.

Decorative escutcheon plates 42 and 43 frictionally engaging with the peripheral flanges of the outside and inside plates l6 and II respectively, are arranged to enclose the bearing plates 23 and the means employed in securing the lock to the door.

To permit the release of the locking mechanism from the outside of the door when for some reason the person on the inside is unable to operate the lock, suitable means is provided for displacing the locking disc 21. As shown in Fig. 3 a releasing bar 44 is arranged transversely in an extension F of the circular opening E; of the door, the inner end portion of said bar being supported by a bearing member 45 secured to the lower pin 24. The releasing bar 44 slidably extends through suitable aligned openings in the inside plate H, the outside plate [6 and the bearing plate 20, and the inner end of said bar is positioned in close proximity to the locking disc 21. The outer end of the releasing bar is formed with an offset portion 46, which may be engaged by means of a slender device such as a hairpin, through a hole 41 in the outside escutcheon plate 42. By engaging the ofiset end portion 46 of the releasing bar 44 with a hairpin or the like the said bar may be pushed inwardly, thereby displacing the locking disc 21 from its locked position. When displaced by the releasing bar 44 from its locking position the locking disc 21 is moved outwardly against the inward pressure of the spring 4| to a position in which its protuberances 30 are disengaged from the holes 3| of the inside plate l1. While the locking disc is thus held in a released position by the bar 44 the shank 32 may be suitably rocked to unlatch the lock mechanism. Upon removing the outward pressure exerted by the releasing bar 44 on the locking disc 21, the spring 4! automatically returns the said locking disc inwardly to its locking position wherein its protuberances again engage with the holes 3i of the inside plate.

What I claim is:

1. In a door look, a casing, latching means mounted in and movable through the casing and normally held in a latched position, two shanks pivotally mounted for rocking movement and extending into the casing, one of said shanks being also mounted for rotary movement, said shanks being arranged in operative engagement with the latching means, whereby upon rocking either shank the latching means is moved to an unlatched position, and a rotatable locking disc coupled to the rotatable shank and arranged to be rotated to a locking position when the rotatable shank is turned in a certain direction.

2. In a door look, a casing, latching means mounted in and movable through an opening in the casing, and normally held in a latched position, a pair of shanks pivotally mounted for rocking movement and extending into the casing, said shanks being connected to the latching means for operating the latter to an unlatched position by rocking either shank, one of said shanks being rotatable, and a locking disc coupled to the rotatable shank and movable to a position preventing the rocking movement of the shanks and to another position to allow said rocking movement.

3. In a door lock, a casing, latching means mounted in and movable through an opening in the casing and normally held in a latched position, a pair of shanks pivotally mounted for rock ing movement and extending into the casing, the said shanks being operatively connected to the latching means, one of said shanks being rotatable, a plate having an opening through which the rotatable shank extends, a rotatable locking disc mounted adjacent the plate and having an opening through which the rotatable shank also extends, the said locking disc being coupled with the shank and rotatable thereby to a locking position.

4. In a door lock, a casing, latching means mounted in and movable through an opening in the casing and normally held in a latched position, a pair of shanks pivotally mounted for rocking movement and operatively connected to the latching means, one of said shanks having a portion substantially rectangular in cross section and being mounted also for rotation, a stationary plate having an opening through which the rotatable shank extends, a locking disc coupled with the rotatable shank and rotatably mounted on the stationary plate and having a substantially rectangular opening through which the rectangular portion of the rotatable shank extends, the said openings in the stationary plate and the locking disc being arranged to allow the rocking movement of the rotatable shank only when the locking disc is in a certain position.

5. In a door lock, a casing, latching means mounted in and movable through an opening in the casing and normally held in a latched position, a pair of shanks pivotally mounted for rocking movement and operatively connected to the latching means, one of said shanks being also mounted for rotation, a stationary plate having an opening through which the rotatable shank extends, a rotatable locking disc normally mounted against the stationary plate and having an opening through which the rotatable shank extends, the said rotatable shank and the locking disc being coupled for simultaneous rotation, the said locking disc when in one position being adapted to prevent the rocking movement of the shanks.

6. In a door lock, the combination set forth' in claim 5 together with means for displacing the locking disc when in a locking position, whereby the shanks may be rocked to unlatch the latching means.

'7. In a door lock, a casing, latching means mounted in and movably held in a latched position, a pair of shanks pivotally mounted for rocking movement and connected to the latching means whereby upon rocking either shank the latching means is unlatched, one of said shanks being also mounted for rotary movement, a locking disc coupled with the rotatable shank and arranged to be moved through the rotation of the rotatable shank to a position preventing the rocking movement of the shanks and to another position allowing the rocking rotative movement of the shanks, and means for limiting the movement of the locking disc and the rotatable shank THOMAS W. ANDERSON.

REFERENCES CITED UNITED STATES PATENTS Name Date Anderson Mar. 4, 1941 Number 

